Line an 8-in. square pan with waxed paper. Grease the paper with 1 tablespoon butter; set aside. In a large heavy saucepan, combine the marshmallows, preserves, brown sugar and remaining butter; cook and stir over medium heat until blended. Remove from the heat.
Stir in granola and mixed fruit; toss to coat. Press firmly into prepared pan. Cover and refrigerate for 1-1/2 hours or until firm. Invert and remove waxed paper. Cut into bars.